Force and Motion

When a teacher is standing at the front of the class, the force of gravity is pulling them down toward the ground. The ground is pushing back with an equal and opposite force. This is an example of

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

What will happen to the movement of the box when 10 N of force is added on the right?

• The box will move upward

• The box will move to the left.

• The box will move downward

• The box will move to the right.

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A push or pull exerted on an object in order to change the motion of the object, force has size and direction

• Centripetal Acceleration

• Force

• Net Force

• Inertia

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Which of the following is an example of unbalanced forces?

• a car moving with constant speed on a straight road

• a hanger hanging on a rod

• a ball thrown up that comes back down

• a parked bus

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Sean held a ball in the air. Which force was he acting against to keep the ball in the air?

• inertia

• friction

• gravity

• heat

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Newton’s first law of motion states that a moving object, unless it is acted on by an unbalanced force, will

• remain in motion.

• eventually come to a stop.

• accelerate

Newton's _____ Law of Motion means that for every force there is a reaction force that is equal in size, but opposite in direction.

• First

• Second

• Third

• Fourth

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NGSS.MS-PS2-1

According to Newton's _____ Law of Motion, when a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer.

• First

• Second

• Third

• Fourth

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Who was the scientist who gave us the Laws of Motion?

• Sir Isaac Newton

• Galileo Galilei

• Albert Einstein

• Aristotle

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A change in velocity over time is called ___________.

• speed

• acceleration

• force

• direction